Registering device for telephone-exchanges.



I No. 846,328. PATENTED MAR. 5,1907.

P. --A. LUNDQUIST.

REGISTERING DEVICE FOR TELEPHQNBE-XGHANGES.

APPLICATION FILED OUT. 20, 1904.

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UNITED STATES PATENT orrres.

FRANK A. LUND UIsr, or oiiioaoo, ILLINOIS.

REGISTERI'NG DEVICE FOR TELEPHONE-EXCHANGES.

No. ceases.

Specification ofLetters Patent.

Patented March 5, 1907.

Application fil ed October 2t 1904. Serial No- 229.233.

To all whom-it may-concern.-

Be it known that I, FRANK A. LUNDnUIsr,

a citizen of the United States ofiAmerica, and a resident of'Chicago, county of Cook, and State of Illinois, havejhvented certain new and useful Improvements in Registering Devices for Telephone-Exchanges, of which the following is a specification. Y

My invention relates to registering devices for telephoneexchanges, and more articu-- are not answered. This result isaaccomplished by placing at'each station. a registering or counting device and providing it with electrical connections so arranged that the registering device will be operated when the called subscriber removes his receiver from its hook.

In the accompanying drawing I have illustrated the arrangement and operation in the simplest and most convenient manner, though it is to he understood that in largeandcomplicated exchanges other connections than.

those shown will be required for the successful operation of reg strat1on These other connections do not, however, involve any dearture from the invention herein illustrated P but are .sim ly adaptations'to the particular form of exc ange to whichjthe invention is applied. The left-hand portion of the said drawing illustrates two SWitching-" mecham' isms forming art of an exchange of the kind shown and 606,7 64, of July 5, 1898, and the right-hand part of the drawing illustrates the two stations connected to these switching mechanisms, i

The switching mechanisms consist of wi ers P, which are movedover contact points by magnets 'A. These contact-points are connected togethervby banks of wires, as shown, or in any other of the well-lrnown manners. There are as many of these wires as there are switching mechanisms, and each wire is a normal or special wire for a different .the ratchet-Wheel M.

escrihed' in my Patent No.

, switching mechanism, sothat connection to a particular wire gives connection to a particular switching mechanism.

Ateach local station there is a-receiver R, which is normally supported upon its hook H, a contact device I), operated by a projection HIon the hook H, agener'ator G, a ringer Q, and aregistering device'M,'operated by 'a magnet M, also some contact devices and con nections, as shown.-

lhe.contact device D consists of a sliding 'pin carried in a pivoted frame DI. It is so constructed that when the hook H rises as a result of removing 'the receiver R the frame D turns on its pivot sufficiently t9 permit .pin Dto make electrical connection with a contact-spring l8. scends, the pin slidcsendwise to again make Connection with the same spring and also with an adjacent spring. 'lhis l 4 relates to releasing the moved mechanism and has no direct bearing on the present application.

The registering device M consists oi any one of the commercial cou g devices. A convenient form has mounted on spindle a series of wheels each having figures "from 0 to 9. When. the spindle is turned, the Wheels advance step by step, indicatr one numlzerhighcr each step. On the spindle of the registering device M is a ratche wheel MK. 'lhe magnet id is provided with an armature-lever and pawl, operating upon These parts are so rranged that each time an electrical impulse passes through the magnet M to operate it the registering device is operated so that it will indicate one more than it indicated prior to the flow of such an impulse.

I Assumingthat a suhscriher at the station illustrated 1n the lbwer-part of the drawing wishes to talk to the suhscrilt er at the station illustrated in the upper part, he removes his receiver and presses key 3. A current then flows from hattery X at central ground 12.3. 4.5.H.6.'A.?.X. This operates magnet A and moves its switch. The suh scril: er repeats this until the contact-maker P of his switch-is in connection with the particular line which .is connected to the base he wants. The drawingshows the callinswitch moved tothis connection. The su scriher then operates his eneratorpvhen acur-- of thecalled switch rent. flows G-86A-7 6-H-9- 1 0Q--1 1-12-13-m assof called switch 14-1516P'mass ofcalling-switchl 312-1 1- or mass of the switchv G, This calls the subscriber, who removes his ofiice for each station, interconnecting wires receiver. Upon'the rising of the hook H the I, for said switching mechanisms, and means projection H in p assing presses the pin D mo ment ari lyinto contac t w i th the spring 18 ,when a current llows: X ground to the called station 117D18-1 1-12-13-called switch 1.tl5

liS-calling switch 13121119*l\i2021-' The magnets A are of low re-.

H- 6A7 -X. I sistance, whereas the magnets M are oi high resistance. When a magnet A and a magnet M's-re in series, as in the circuit just described,

the magnet M willbe operated, but its resisttion at any other station. It will be quite apparent that there willbe no registrationat the calling station unless the subscriber at" the called. station answers the call.

mechanism so as to complete connections from his'own station to any of the other st ations in the exchange, and a registering device-at each local station arranged to be operated by a response received from the selected station.

The combination with the stations of a telephoneexchangc, of an electrically-operated registering;- device at each station, means by which a subscriber at any one station, may pl ce his registering" device in connection with a selected one of the other stations, and automatically operating means by which upon a response being received from the selected station an impulse will be sent through the electrically-operated registering' device of the calling-station.

3. The combination with a series of local stations each of which is provided with an clectrically-operated switching mechanism located at a central office, and means con trolled from each station for operating its switching mechanism so as to select and sighad a desired one of the other stations, o a registering device at each local station, and means by which a response received-from the selected station will cause an automatic operation of the registering device at the se looting-station. v I 4. The combination ,with a series of local.

"stations, a switching mechanism at a central I The further operations oi the exchange, such as release of controlled from each station for shifting its switching mechanism to any desired interconnecting wires so as to complete electricai connections from a calling to a desired one of the other stations, of an,electrically-operated registering device at each station, an electrical connection from one side of each registering device to the associated switching mechanism, a battery at the central office and a receiver-hook at each local station, another connection from the other side of each registering device to said battery, said last-mentioned connection being .open when the. receivephook is depressed and closed when the hook is elevated, andmcans by whicheach hook in moving from its depressed to its elevated position temporarily closes a connection between saidbattery and the interconnecting wire which is normal for that station. 4

5. The combination with, a series of local stations, a switching mechanism at a central office for each station, a normal wire for each switching mechanism, and means controlledfrom each. station for connecting its switch ing mechanism to any of theother normal wires, of a registering device at each station provided with connectionsto the switching mechanism thereof, and means by which upon a subscriber at anyv station responding to a signal delivered thereto an electrical impulse, will'fiow over the normal wire of the responding station and cause an operation of the registering device belonging to" the station which has connectedits switching mechanism to that wire.

6. The combination with the local stations and the electrically-operated switching mechanisms'o't' an automatic telephone-exchange, of a registering device at each local station,

and means by which the registering device of a calling-station is operated by a response being received from a called station.

7. The combination with the stations of a telephone-exchange, means for completing tcle )honic connections between a calling and a called station, and a device at each station for registering the calls originating thereat,

of a battery and devices so arranged that therefrom, of aregistering device at each station for indicating the number of calls originating thereat, and automatic means actu- 9. The'combination with the stations of a telephone-exchange, switching mechanisms by Which calling and called stations are placed in telephonic connection with each other, and a registering device at each station forindicating'the calls originating there at, ofa battery, devices for sending short impulses therefroin, means by Which said battery is inactive at times other than those when short impulses-are sent, means by which impulses sent from said battery serve to operate said switching mechanisms so as to place calling and called. stations in telephonic connection with each other, and means by which an extra impulse sent from said battery will operate the registering device of the c'allingsta'tion. I

Signed at Chicago, lllinois, this 14th day of October, 1904. y

FRANK A. LUNDQUIST. Witnesses C. L. REDFIELD,

CARRIE E. Joanna 

